How to Drive WS2811 LED Strips with ESP8266 & FastLED

				
					#include 

#define LED_PIN 19 // LED strip data pin

#define NUM_LEDS 80 // Number of LEDs

#define BRIGHTNESS 128 // Initial brightness (0-255)

#define LED_TYPE WS2812B

#define COLOR_ORDER GRB // Most WS2812s are GRB order

CRGB leds[NUM_LEDS];

// Effect mode enumeration

enum Effects {
EFFECT_FLOW,
EFFECT_BLINK,
EFFECT_MARQUEE,
EFFECT_COUNT
};

uint8_t currentEffect = EFFECT_FLOW;

unsigned long lastEffectChange = 0;

unsigned long lastUpdate = 0;

void setup() {
delay(3000); // Safety delay
FastLED.addLeds(leds, NUM_LEDS);
FastLED.setBrightness(BRIGHTNESS);
Serial.begin(115200);
}

// Full color water effect
void flowEffect() {
static uint8_t hue = 0;
static uint8_t pos = 0;

// Gradually turn off all LEDs
fadeToBlackBy(leds, NUM_LEDS, 10);

// Set a color light spot at the current position
leds[pos] = CHSV(hue, 255, 255);

// Move position
pos = (pos + 1) % NUM_LEDS;

// Change hue
hue += 3;

FastLED.show();
delay(30);
}

// Full color blinking effect
void blinkEffect() {
static bool lightsOn = false;
static uint8_t hue = 0;

if(lightsOn) {
// Random color for all lights
fill_solid(leds, NUM_LEDS, CHSV(hue, 255, 255));
hue += 5;
} else {
// All lights off
fill_solid(leds, NUM_LEDS, CRGB::Black);
}

lightsOn = !lightsOn;
FastLED.show();
delay(lightsOn ? 200 : 800); // On for 200ms, off for 800ms
}

// Marquee effect
void marqueeEffect() {
static uint8_t hue = 0;
static int position = 0;
static int tailLength = 15;

// Gradual extinguishing
fadeToBlackBy(leds, NUM_LEDS, 20);

// Create a marquee
leds[position] = CHSV(hue, 255, 255);

// Create a gradient tail
for(int i = 1; i  30000) {
currentEffect = (currentEffect + 1) % EFFECT_COUNT;
lastEffectChange = millis();
FastLED.clear();
FastLED.show();
}

// Execute the current effect
switch(currentEffect) {
case EFFECT_FLOW: flowEffect(); break;
case EFFECT_BLINK: blinkEffect(); break;
case EFFECT_MARQUEE: marqueeEffect(); break;
}

// Brightness control (optional)
// adjustBrightness();
}

// Optional: switch effects via serial port commands
void serialEvent() {
while(Serial.available()) {
char c = Serial.read();
if(c >= '0' && c <= '2') {
currentEffect = c - '0';
FastLED.clear();
FastLED.show();
}
}
}

// Optional: Brightness adjustment function
void adjustBrightness() {
int potValue = analogRead(A0); // Connect the potentiometer to A0
int newBrightness = map(potValue, 0, 1023, 0, 255);
FastLED.setBrightness(newBrightness);
}